Dental multiple-jaw cervix-clamp.



J. w; IVORY, v DENTAL MULTIPLE JAW CE'RVIX CLAMP.

APPLICATION FILED DEC-18. 1917.

1,265,66 Patented May 7,1918.

A TTORNE Y8 JAMEsw. IVORY, OFPHILAIDEIJPHIA, PENNSYLVANIA.

DENTAL MULTIILE-JAW CERVIX-CLAMP.

' Specification of Letters Patent.

Patented May 7, 1918.

v Application filed December 18, 1917. Serial No. 207,654.

To all whom it may concern:

Be it known that I, JAMES W. IVORY, a subject of the King'of GreatBritain, residing in the city andcounty of Philadelphia, State ofPennsylvania, have invented a new and useful Dental Multiple-J awCervix- Clamp, of which the following is a specilication.

My invention consists in providing. a dental cervix clamp with aplurality of interchangeable auxiliary jaws adapted for differentpurposes, as for instance, one for ordinary cervical cavities, andothers, rights and lefts for cavities that extend around and be tweenthe teeth on. either side, they being adapted to fit the juncture of thebow of. the clamp and are easily changeable, providing also for theattachment of jaws of other patterns.

The invention is satisfactorily illustrated in the accompanyingdrawings, but the important instrumentalities thereof maybe varied, andso it is to be understood that the invention is not limited to thespecific details shown and described, as long as they are within thespirit or scope of the claims. Figures 1 and 2 represent elevations ofopposite sides of a dental multiple jaw cervix clamp embodying myinvention.

Fig. 3 represents an elevation at a right angle to Fig. 1.

Fig. 4 represents a longitudinal section of the clamp.

Fig. 5 represents an elevation of the bow of the clamp having thereon amember embodying my invention.

Fig. 6 represents an elevation of a bow having thereon an auxiliary jaw,and the attaching device therefor embodying my invention.

Fig. 7 represents a perspective view of said jaw and device.

Fig. 8 represents a section thereof on line 8-8 Fig. 7. i

Fig. 9 represents a transverse section of a portion on line 99 Fig. 2.

Figs. 10 and 11 represent elevations of jaws for right and leftpurposes.

Figs. 12, 13 and 14 represent elevations of different forms of auxiliaryjaws that may be employed, Fig. 13 being at a right angle to Fig. 1

Similar numerals of reference indicate corresponding parts in thefigures.

Referring to the drawings. 1 designates the how of a dental cervical'able auxiliary jaws 5, as

marginal clamp, and 2 and 3 designate jaws thereof mounted slidably onthe'frame of the clamp which jaws with other features, and the operatingmechanism of the movable members are in general respects the same asshown in the dental cervical marginal clamp for which Letters Patent ofthe United States, No. 1,032,833, were granted to me on the 16th day ofJuly, 1912.

To the terminals of said bow as shown in said patent there is attachedthe outwardly extending tongue at which forms a juncture for saidterminals on what comprises the crown of the bow which is adapted tosupport different forms of separate interchange will be hereinafterdescribed.

In Fig. 6 I show one of said jaws, it being of segmental shape andstanding out from the base of a sleeve 6 which may be fitted on thetongue 4 and so supported, said sleeve having connected therewith there-.

silient finger 7 forming a spring which is adapted to bear against saidtongue 4 and so by'friction retain the sleeve and consequently the jaw 5on said tongue.

In the base of the tongue 4. is the recess 8 into which the terminal ofthe spring 7 is seated so as to assist in retaining the sleeve 6 withits jaw 5 steadily and firmly in position on the tongue 4.

In Figs. 10 and 11 the jaws are made respectively right and left. InFigs. 12,13 and 14 the jaws are of lengths or breadths different fromthose shown in Figs. 6, 10, and 11.

It will be seen that owing to the jaws employed on the bow the clamp isadapted to meet any condition that would appear in the class of cavitiesin teeth. The jaws are made narrow Or broad for ordinary cervicalcavities, and rights or lefts for cavities that extend around andbetween the teeth on either side.

Jaws of other patterns are adapted to be employed and attached to thetongue 4 and held in position thereon.

It will be seen that I employ three jaws each independent of the other.When the clamp is applied, the jaw on the bow is carried in positionabove the cavity or margin by the operation of the proper screw of thehow, the force being sure but being exerted gradually. When the clamp isplaced on the tooth but not drawn too taut, the labial jaw must becapable of moving. Then the edge of the rubber that is around the toothshould be misec't se that it tes s 011 the etfltl at the top of thebet'oe forcing thejawinte posi. the keeps the rubber out 0: the W 2111'vents it from being torn. 'Fpwn till? i is in place anti made secure therub The tongue terms JUUCtiOH of the heretetere separated terminals ofthe bow and mre pee am on the la zt' {tent-3.1 cervix: t s amber, and5516 3;; beztybei "W J3 1 0w e m the "mate ELUKLlQlV "I v be mountedheiee; fade he i e. thereon.

511 dental cervix clamp he? :1 how, separate auxili jaw, and a tongue011 said how -01 the attachmentot said jaw thereto. i V

L51 dental ,cei riri clamp 115m a bow,

and mean)" for primary eemieetion tie clamp with e tooth an d separatee11: new

ettee see to said how beyond said W nne. t t V v 16 in e detail eerviichimp, separate interchangeable euxiliery jaws either of which isadapted-t9 be mounted on member of 1 r TE'QTOYifiiECi with means to; se-

tieh thereon. I

ejewtt'o r :1 dentai CQlYiX 30W, sleeve-like member b tying; Sadie get-Waiict i'esilie t device on said me1nbe1:,,1i1embet being ecie pted tonew said how and said device ed te ttietienally engage said. been. t i Vi v i 8. in a cientai Cervix chimp, a jem' shalfifty mounted en theframe thereof, an ei eeen epposite siries 0t shank 0t said jaw@yejectieg ieteri therefrom.

JeMEe t reeif.

